Shimano Rear Derailleur
6 models, 10 verified variants. Only rows checked against Shimano’s own page are listed.
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec. A cell marked not stated is a field the maker does not publish, so nothing here checks it.
| Model | Variants | System | Speeds | Actuation | Maximum cog | Mount | Cage | Price (MSRP) |
|---|---|---|---|---|---|---|---|---|
| Shimano GRX RD-RX400-GS | 1 | Drivetrain system shimano-grx-10 | 10-speed (rear index count the maker rates it for) | Mechanical | Largest cog 34 teeth | Std-hanger | gs cage | $65.00 |
| Shimano GRX RD-RX717-SGS | 1 | Drivetrain system shimano-grx-12 | 12-speed (rear index count the maker rates it for) | Di2-wired | Largest cog 51 teeth | Std-hanger | sgs cage | $420.00 |
| Shimano GRX RD-RX810 | 2 | Drivetrain system shimano-grx-11 | 11-speed (rear index count the maker rates it for) | Mechanical | Largest cog 34 teeth (on 1 of 2 variants); Largest cog 42 teeth (on 1 of 2 variants) | Std-hanger | gs cage (on 1 of 2 variants); sgs cage (on 1 of 2 variants) | $100.00 to $180.00 |
| Shimano GRX RD-RX815 | 2 | Drivetrain system shimano-grx-11 | 11-speed (rear index count the maker rates it for) | Di2-wired | Largest cog 34 teeth (on 1 of 2 variants); Largest cog 42 teeth (on 1 of 2 variants) | Std-hanger | gs cage | $300.00 to $350.00 |
| Shimano GRX RD-RX822-SGS | 2 | Drivetrain system shimano-grx-12 | 12-speed (rear index count the maker rates it for) | Mechanical | Largest cog 45 teeth (on 1 of 2 variants); Largest cog 51 teeth (on 1 of 2 variants) | Std-hanger | gs cage (on 1 of 2 variants); sgs cage (on 1 of 2 variants) | $400.00 to $420.00 |
| Shimano GRX RD-RX825 | 2 | Drivetrain system shimano-grx-12 | 12-speed (rear index count the maker rates it for) | Di2-wired | Largest cog 36 teeth (on 1 of 2 variants); Largest cog 51 teeth (on 1 of 2 variants) | Std-hanger | sgs cage | $450.00 to $500.00 |
Source for every row: Shimano’s own product pages, last checked between 2026-07-17 and 2026-08-15.
The checker compares the dimensions listed in what we check, and what we don’t. “No conflicts found” means no conflict among those dimensions — not a guarantee that a build works. Errors mean it won’t fit; warnings mean it works but check; infos are notes.